Gas-generator for street-lamps.



No. 7||,5|2. Patented oct. 2|, |902.v

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GAS GENERATOR FUR STREET LAMPS.

(Application led Apr. 5, 1901.) (No Model.) v 2 Sheets-Sheet I.

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Patented 06f. 2|, |902. E. B.l LUDWIG.

GAS GENERATUB FOR STREET LAMPS.

(Application med Apr. 5, 1961.3

(No Model.) 2 Sheets-Sheet 2.

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NTTn K STATES PATENT OFFICE..y

EDINIUND B. LUDWIG, OF KANSAS CITY, MISSOURI.

GAS-G EN ERATOR FOR STREET-LAM PS.

SPECIFICATION forming part of Letters Patent N o. 711,512, dated October 21, 1902. Application tiled April 5 1901. Serial No. 54,476. (No model.)

T0 a/ZZ whom t may concern:

Be it known that I, EDMUND B. LUDWIG, a citizen of the United States of America, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Gas- Generators for Street-Lamps; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

The object of myinvention, primarily, is a self-generating carbureting apparatus for street-lamps; second, the automatic regulation and supply of the vaporized carbureted agents in quantity; third, to comminute the liquid to be sprayed.

The invention consists in the novel combination and construction of parts, such as will be first fully described, and specifically pointed out in the claims.

In the drawings, Figure 1 is a view of the hollow liquid-receiving and compressed-airstoring lamp-post, partially in vertical section and its base anchored in the ground, also showing a side view of the self-generating lamp upon which the carbnreting-valves for the liquid to be vaporized and the gasmixing agents are operated and also the pump for compressing air. Fig. 2 is a vertical sectional view of the upper end ofthe lamp-support-ing hollow post, showing the supplementary receiver for the compressed air and its valve, also showing the end of the deliverypipes for the generated gas and for the delivery of the compressed air to the valve. Fig. is a vertical sectional View of the vapor-spraying-device casing for the admission ofthe iiuid to be vaporized under pressure and also showing a portion of the vaporizing Fig. 4 is a horizontal sectional view of the separate valves controlling the admission of the liquid to be vapor-ized and the gas-mixing agent to the spraying-valve casing,taken upon the line .r :c of Fig. l and also line y y of Fig. 3. Fig. 5 is a vertical sectional view of the fluid heating or vaporizing pipe and of the air and gas mixing chamber and a portion of the distributing-pipe for the generated gas, showing the adjustable sleeve connection for 'plate a4.

Fig. 7 is a detail view ot' the end of the valvestem in the carbureting-valve casing, showing the groove in the cone-val ved portion. Fig. 8 is asectioual View of the valve-casing, taken upon the line e' z of Fig. 3, showing the orifices for the Huid and liquid. Fig. 9 is a view of the self-generating carbureting-lamp as in Fig. l, enlarged, showing means for suspending the lamp, also showing the modified form of the receiver for the liquid to be vaporized under pressure. Fig. l0 is a detail view of the balance-valve.

Similar letters of reference indicate corresponding parts in all the figures of the drawings. ,l

Referring to the drawings, A represents the hollow lamp-post for the reception of the liquid to be vaporized and which consists of an upright hollow cylinder or reservoir a, its lower end rest-ing upon the surface of the ground. Both ends of the cylinder d are externally screw-threaded, and upon its lower end is an iuternaily-screw-threaded flanged cap d', in which is a threaded opening 0.2, in which is fitted the screw-threaded upper end of a rod a3, the lower end of which rod penetrates the ground to a suitable depth and is connected rigidly with a circular anchoring- Upon the upper end of cylinder o., which extends the proper height, is a screwthreaded cap a5, inwhich is a screw-threaded opening 0.6, `in which is fitted the externallyscrew-threaded lower end of a tube or pipe al, which extends upwardly a considerable distance and is also externally screw-threaded at its upper end. At said upper end of pipe d'7 is a diaphragm B, of considerable thickness and larger in circumference than the pipe a7. At the outer edge of and extending downwardly from the under side of the diaphragm B is an internally-screw-threadedannular ange b, which is fitted to the screwthreaded upper end ofthe pipe al. Fromthe upper side and outer edge ot' the diaphragm B extends upwardly an internally -screwthreaded annular flange b'.

In the under side of diaphragm B ata point equidistant from its outer edge is formed a IOO screw-threaded opening b2, extending nearly one-half the distance in the direction ofthe upper side of said diaphragm, in which is fitted the upper end of a small-sized fiuidconducting pipe C, the lower end of which pipe extends downwardly into the cylindrical receiver a and to a position a short distance above the bottom of said receiver or cap a'. Through one side of the diaphragm B is drilled an opening b3, which extends to and communicates with the opening b2 for pipe C, the outer end 1240i which opening b3 is screw-threaded. In the other side of diaphragm B in the direction of the opening b2 is a screw-threaded opening (l, in which is fitted a screw-threaded valve-stein d', the inner end of which stem is fitted to the valveseat dx, and upon the other end of the stem is a hand-wheel D. Extending horizontally from the valve-seat dx in the opening d a short distance is a tort-nous passage d2, smaller in size than the opening (Z, which is also extended at right angles upwardly through the upper surface of the diaphragm. In the under side of the diaphragm is an opening d3, which communicates with the opening CZ a short distance from the valve-seat (ZX toward the outer end of said opening.

In the screw-threaded annular opening Z9' isfitted the lower end of a short length of pipe E, which is the same size as pipe a7 and forms the supplementary air chamber or receiver for compressed air, the upper end of passes upwardly into the opening e3.

which pipe is externally screw-threaded and extends a short distance in height or approximately to the height of the ordinary street-lamp post. At the upper end of pipe E is an internally-screw-thrcaded anged cap c, which is fitted to the screw-threaded upper end of the said pipe. Upon the upper surface of cap c and integral therewith is a east block e', extending across the said cap. (See Fig. 6.) From the upper surface of said block at a point equidistant from its end is an upwardly-extended neck e2. In one end of the block c is a screw-threaded opening e3, in which is inserted one end of a small tube e4 for conducting compressed air to the spraying-valve, hereinafter described. Through the cap e extends afsmall passage e5, which In the other end of the block c is a passage e6, which extends inwardly in the direction of the opening e2 a short distance, then is directed upwardly in4 a curved line, passing through the neck c2. The end of said opening in the block e is screw-threaded, and in said screwthreaded opening is fitted one end of a distributing-tubef for the generated gas.

F represents the novel carbureting spray ing device, which consists of a longitudinallyextended valve casing f of considerable thickness, which is cored out longitudinally, forming an opening fx, extending from one end j'2 of the valve-casing to within a short distance of the other end f3 of said casing. At the inner end oi' the core is a cone-shaped valve-seat f4. In the end f2 of the Valvecasing the cored part of the casing for a short distance is reduced in size and screw-threaded, as at f5. Extending through the valveseatf is a small-sized openingf. The end f3 of the valve-casing extending longitudinally to the valve-seat f4 is also cored out, forming an opening f7, the size of the opening being in excess of the width of the opening f upon the other side of the valve-seat. The opening f7 is screw-threaded.

Gr represents the valve-stem, the outer end g of which is screw-threaded a short distance to fit the screw-threaded openingfi', the inner end of the stem being cone-shaped at g' to lit the valve-seatf4- In the outer surface of the cone-shaped end of the valve-stem are the grooves g2 g2, which extend from opposite sides of the valve-stem to the pointed endof the cone and in planes parallel with the face of the cone, as seen in Figs. 7 and 8, the opening]CG in the valve-seat exposing slight portions of the grooves at the point of the cone. The valve-stem G is also reduced longitudinally in size, extending from the cone-shaped end g' to the threaded portion g, or nearly the length of the longitudinal opening fx, and thus providing a valve-chamber extending around the stem of the proper extent to admit of the passage of the liquid to be sprayed. Upon the end g of the valve-stem is a handwheel g4, whereby the stem may be removed from `the valve-casing should the grooves g2 become clogged. With the under side of the end portion f2 of the valve-casing and cast integral therewith is a globe-valve casing g, upon the under side of which casing is a neck or flanged extension Q7, in which is a screwthreaded upwardly extended tube opening g8. From the inner end of the opening g8 extends a small-sized passage gf), which leads upwardly through the globe-Valve casing g, through the valve-casing f, into the chamber or opening fx. In the globe-valve casing g6 and extending in a line horizontally or at right angles to the passage g9 is a valve-opening gw, having a valve-seat gx, as seen in Fig. 4, which communicates with the passage gg, the outer end of which opening glo is screwthreaded, and in said opening is a screwthreaded valve stem gm, the inner end of which stem is cone-shaped and extends Within the valve-seat gx. Upon the outer ends of the valve-stem g1 is a hand-wheel g, The

i outer side of the end f3of valve-casing f', ex-

tending from a point f4 in a vertical line with the inner end of the opening fx near the valveseat g in the direction of the end f2 of said casing a little over one-half the distance toward said end, is reduced in size circumferentially in a slight degree, forming a shoulder f8, and extending around said reduced portion is an annular shell or casing I-I, of slightly-curved circumference internally, between which casing I-I and the reduced portion of the casing j" is an annular space or chamber 7L. The inner end of casing I'I abn ts IOO IIO

against the shoulder f8. Between the shoulder f8 and the inner end of the casing H is a washer fg, composed of lead or other suitable material. Upon the outer surface of the inner end of casing H and also upon the valvecasing f are formed right and left hand screw-threads, and extending around said screw-threaded parts is a nut I2, which is also provided with right and left hand screwthre'ads, securing said casing H to the valvecasing f. In the valve-casing j" and communicating with the end of the chamber or annular opening h in the direction of the end 3 of the casing are separate passages or perforations h h', one of which extends from the upper side of the casing f downwardly through said casing at an angle in a plane parallel with theinner side of the cone-shaped valve-seat f4 into the opening or chamber f7, the other perforation extending from the under side of the valve-casingfat the same angle through said casing upwardlyinto the chamloer f7 in a plane parallel with the inner side of the valve-seat f4. Within the screw-threaded opening f7 is an externally-screw-threaded plug I, the outer end of which plug forms a valve-seat for a balance-valve, hereinafter described, and between the inner end of which plug and passages f6 and h h is formed the spraying-chamber. Extendinglongitudinally through the plug I is a small perforation or passage i. The other end of plug I extends to within a short distance ofthe end f3 of the valVe-casingf, and in said casing f3 is an annular groove i2, concentric .with the opening f7 and near the outer end of plug I, in which groove is a balance-valve 713 of lesser circumference than the concentric groove 2 and lesser thickness compared with the width of the groove. Connected with the inner side of the balance-valve 3 is a pin or stem 4, smaller in size than the perforation t" in the plug, which extends within the opening z" in the said plug I.

With the annular casing H is cast or formed integral therewith a globe-valve casing K, which is similar to the valve-casing g, which also extends downwardly the same distance as the casing g and is provided with a flanged portion k, slightly larger in size than the opening g8 in said casing g, in which portion 7c is a screw-threaded opening 7c. Extending upwardly from the opening Zr is a small passage 7a2 for the compressed air, which extends through the valve-casing K and communicates with the annular chamber h within the shell H. Extending horizontally through the valve-casing K is a screw-threaded valveopening 7c3, as shown in section in Fig. 4, the inner end of which opening communicates with the opening k2 and in which opening k3 is a screw-valve stein h4, the inner end of which stem is cone-shaped and extends to the valve-seat Z55 of like formation in the valve-easing gG.

Upon the valve-stem Q12 to the valve g*i on the inner side of wheel g14 is asmall oog-gear .connected with the pipe-joint r4.

L, and upon the outer end of the Valve-stem 7a4 is a cog-gear M, which meshes with the gear L.

O represents the gas vaporizing or heating pipe, one end o of which is enlarged circumferentially to the size of the end f3 of the spraying-valve casing and said enlarged end internally screw-threaded and fitted to screw-threads w which are formed on theoutei' end of the shell or casing H of the sprayingvalve F. The end of the enlarged portion o of tube O abuts against the outer end of the shell or casing H. Within tube O is a filling 0X, of wire-gauze or like substance.

P represents a short flue for obtaining draft to the flame, through the sides of which the outer end of the pipe O passes, upon the upper end of which is a hood p, secured thereto by strip p. With the lower end of the flue P is connected an annular delector p2. The o'uter end of the vap'orizing-pipe O is externally screw-threaded, and upon said end is a threaded nipple 02, in the end of which nipple is a passage or orifice o3.

R represents the air and gas mixing chamber, one portion r of'which consists of an annular outwardly-Haring or cone-shaped shell which extends from the outer side of and is integral with the nipple o2. The other adjustable portion consists of a cone-shaped shell r', the circumference of which is slightly smaller than the shell r, the `outer edges of which shell r' extend within the outer edges of the shell r. The annular inner edge ofthe IOO shell r is connected rigidly with the end of a slidable sleeve r2. Within said sleeve r2 eX- tends one end of a short length of pipe r3, the other end of which pipe extends within a twoway pipe joint or elbow r4.

The spraying-valve F and the vaporizingpipe O are placed in position a considerable distance above the opening e5 for the generated gas in the upper end of the chamber E in the lamp-post, the detlectorjo2 on the draftflue P on the heating-pipe O being directly above said opening e6. The other end of tube f for the passage of the generated gas extends upwardly from the cap e in the pipe E and is The other end of the tube e4, connected with the pipe or chamber E, extends outwardly a short distance and then extends in an upward direction and is connected with the threaded openingA 7c in the globe-valve K. Another tube S is connected at one end with the threaded opening gS in the portion Q7 of the globevalve g, and which conducts the luidto be vaporized, and the other end extended downwardly as far as the line of diaphragm B in the lamp post A and connected with the threaded opening b4 in said diaphragm. In the cap a5 on the upper end of the cylinder or receiver a, of thelamp-post is a threaded opening as for supplying the receiver with the hydrocarbon or gasolene, which is closed bya screw c.

T represents an air compressor or pump of- IIO the ordinary description, having a plunger and a handle t'. With the lower portion of the air-compressor is connected one end of a flexible tube 152, the other end of which tube extends to the cap a5, in which cap is a cutoff valve am, and with which valve said tube 'lf2 is removably connected.

Upon the neck of cape on the pipe or shoulder E is an ordinary mantle U, around which extends a transparent globe V, the lower end of which rests upon the cap e2.

In the employment of the apparatus for street-lighting the cylinder or receiver a of the lamp-post is supplied nearly its full capacity with gasolene, as the preferred mineral product, through the opening a8 and the opening closed by the plug a. The valve d in the diaphragm B and 7a4 912 in the globevalves 7s' and g6 being closed, the compressedair pump T is operated to supply the upper portion of the receiver d and the pipe a7 with air under pressure, the valve d10 in the cap d5 being opened for the purpose. As soon as the necessary pressure of air is obtained the valve d10 is closed. The air thus confined forces the gasolene `up the pipe C, through the passage b2, and also through the tube S to the valve-seat g in the globe-valve gu. For the initial production of a vapor in order to edect instantaneous lighting of the lamp the valve .D in the diaphragm B is opened in a slight degree to admit the compressed air into the pipe or receiver E, which passes through the tortuous opening (Z2 d3 and which also passes through the small orifice c5 into the pipe e4 to the valve-seat 7c5in the globe-valve K. The valve D is then closed. The wheel 914 on the spraying-valve is then turned and which through the gears L M on valve-stems g12 and 7c4 turns both stems simultaneously, opening the valves suiiicientlyto admit gasolene through the passage gf in the globe-valve g to the chamber fx around the valve-stem G, and at the same time the compressed airis admitted through the passage 7a2 in the globevalve K to the annular chamber 7L. The gasolene in the chamber fx passes through the grooves g2 g2 in the cone-shaped end of the valve-stein G in minute quantity, and upon reaching the point of the said end the two streams meet with force enough to form a spray in chamber f7. The compressed air which passes through the orifices 71, 71, meets 'and mixes with the spray formed by the two streams of gasolene in meeting and readily vaporizes it, thereby forming a hydrocarbon vapor in the chambery"17 of quick-lighting efficiency. This vapor passes through the opening t" in the plug I and around the outer edge of the balance-valve t3 through the vaporizing-pipe O to the gas-mixing chamber R, which being closed the vapor passes through the tube fto the opening e6 inthe cap c. This vapor is then ignited above the opening, and the flame being directed upon the vaporizingpipe O continues to burn until the compressed air is wholly exhausted from the supplementary receiver E, the pipe O in the meantime becoming heated in a sufficient degree to generate the gas. The gasolene under pressure from the receiver a, passes through freely the vaporizing-pipe O and is vaporized. The section r of the gas-mixing receiver, into which the generated gas now passes, is then moved or adjusted from its closed position on the pipe r3, so as to admit the proper quantity of air, which instantly mixes with the generated gas, and the combined air and gas passes through the pipe fto the opening e, and a large brilliant fiame of great illuminating power is constantly maintained', the pressure in the receiver a being sufficient to afford the consumptionof the large quantity of gasolene employed and fora long period of time.

The back pressure of the gas upon the balance-valve working upon a larger area than the initial pressure of' the gas has a tendency to push the balance-valve against the outer end or face of the plug I, consequently reducing the quantity ot' gas passing around the edge of the balance-valve to the Vaporizing-chamber and controlling, automatically, the quantity of gas passing to the vaporizingchamber. As the initial pressure goes down of the gasolene the quantity is kept constant by the balance-valve. I may decrease the length of plug I and increase the length of the spraying-chamber, if preferred.

I have shown, Fig. 9, an enlarged view of the novel carbureting-lamp constructed precisely the same as in Fig. l, adapted, however, to be suspended in position, and which may be employed for illuminating public buildings, as well as streets. For this purpose the main supply-reservoir W for gasolene is made shorter in length than the reservoir d in Fig. l and larger in circumference, the pipe X, connecting the reservoir with the flanged diaphragm, being short in length. The reservoir is filled with gasolene and charged with the compressed air in the same manner as the reservoir a in Fig. l. In order to suspend the lamp, a wire bailYis employed, which is connected at one end with a lug on the pipe-joint r4 and at the other end with a lug on the spraying-valve.

The spraying device F may be employed in connection with any apparatus for generating gas, it being also adapted for vaporizing oil and Water in hydrocarbon-burners or with steam and oil.

Other modifications of the invention may be employed within the scope of the invention.

Having fully described myinvention, what I now claim as new, and desire to secure by Letters Patent, is-

l. The combination in a hydrocarbonburner, of a vaporizing-tube, and a valvecasing having a spraying-chamber and connected with said vaporizing-tube so as to leave an annular groove, abalance-valve arranged in said groove to separate the spraying-chamber from the vaporiZing-tube, the

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area of the interior of the vaporizing-tube adjacent to said valve being greater than the area of the spraying-chamber.

2. The combination in a hydrocarbonburner, of a vaporizing-tube, and a valvecasing having a spraying-chamber and connected with said vaporizing-tube so as to leave an annular groove, a balance-valve arranged in said groove to separate the spraying-chamber from the vaporizing-tube and having a projection extending loosely into said spraying-chamber, the area of the interior of the vaporizing-tube adjacentsaid valve being greater than the area of the sprayingchamber.

3. A carbureter comprising a valve-casing having separate inner and outer concentric chambers for the reception of the carbureting agents to be vaporized, and a perforate, conical Valve-seat at the end of the inner chamber, said Valve-casing having orifices at the corresponding end of the outer chamber in opposite, inwardly-inclined planes, and a spraying or vapor chamber upon the opposite side of the valve-seat, with which the said orifices communicate, avalve-stem in the inner chamber ofthe valve-@asin g and a conevalve upon said stem having grooves on itsV surface, inclined toward the perforation in the valve-seat, means for supplying said concentric chambers of the valve-casing with carbureting agents to be vaporized under pressure, a perforate plug in the outer end of the spraying or vapor chamber, for the passage of the vapor, a balance-valve bearing upon the outer end of said plug and having a passage for the vapor .between the outer edge of said valve and the inner surface of the valve-casing, and a loose-fitting stem on the said valve extending within the perforation in said plug.

4. A carbureter comprising a valve-casing having separate inner and outer concentric chambers for the reception of the carbureting agents to be vaporized, and a perforate con ical Valve-seat at the end of the inner chamber, said valve-casing having orifices at the end of the outer chamber, in oppositely-inclined planes, and a spraying or vapor chamber upon the opposite side of the valve-seat, with which said orifices communicate, and an annular groove in the valve-casing within said chamber7 avalve-stem in the inner chamber of the valve-casing, and a cone-val ve upon said stem having grooves inclined toward the forward end of said cone-valve, means for supplying the carbureting agents to the respective inner and outer concentric chambers kof the valve-casing under pressure, a perforate plug on the inner side of the annular groove of-the spraying-chamber closing the outer end of said chamber, a balance-'valve within the said groove, and a stem on said valve extending loosely within the perforation in said plug.

5. A gas-generating apparatus comprising a reservoir for storing the liquid to be vaporized under pressure, and an air-compressor, a supplementary receiver for compressed air and a pipe connected therewith and with said reservoir, and a valved connection between the reservoir and the spraying-chamber, a vaporizer for the iiuid, a spraying device connected with the vaporizer, having a sprayingchamber at one end thereof, and a balancevalve within said chamber, having a passage for the vapor between the outer edge of the said valve and the inner surface of the spraying-chamber, a supply-pipe connected with the spraying device and extending Within saidreservoir, and a supply-tube connected with the supplementary, compressed-air receiver and also connected with the spraying device.

c 6. A carburetor comprising a reservoir for the liquid to be vaporized under pressure, means for supplying said reservoir with compressed air, a pipe connected with thereservoir at one end, a supplementary receiver for compressed air connected with the other end, and a diaphragm between said pipe and the said air receiver having a' passage therethrough for the compressed air, and a valve closing said passage, a valve-casing having concentric inner and outer chambers, and a spraying-chamber at one end of said casing, said inner chamber having a valve-seat at one end and a perforation leading to the spraying-chamber and orifices in the valve-casing leading from the outer chamber' in said valvecasin g to the spraying-chamber, a valve-stem in the inner chamber and a valve upon said stem within said valve-seat, a balance-valve in said spraying-chamber having a passage for the Vapor between the outer edge of said valve and the inner surface of the sprayingchamber, a vaporizing-tube connected with the end of the valve-casing having the spraying-chamber, a liquid-conducting tube having one end extending within the reservoir containing the liquid under pressure, and the other end connected with the inner chamber of the valve-casing, a tube connectedV With the supplementary air-receiver and also connected with the outer chamber of the valve-casing, and a separate tube for the generated gas connected with the outer end of the Vaporizing-tnbe having the other end extending beneath the said vaporizing-tube.

'7. In a gas-generating street-lamp, a hollow post, a reservoir in its base for the reception of the liquid to be vaporized, means for supplying said reservoir with compressed air, a supplementary compressed air receiver, a conductor of the compressed air leading from the reservoir in the base of the post to said supplementary air-receiver, and a Valve cutting o the supply of compressed air, a gasgenerator at the upper end of Y said post, a fluid-conducting tube connected with the generator and extending within the reservoir in the base of the post, and a tube connected withsaid generator and also connected with the supplementary compressed-air receiver.

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8. In agas-generating street-lamp, a hollow post, a reservoir in its base for the reception of the liquid to be vaporized, means for supplying said reservoir with compressed air, a supplementary compressed-air receiver upon said post, a conductor of compressed air leading from the reservoir in the base of the post to said supplementary air-receiver, and a valve cutting oi the supply of compressed air, a gas-generator at the upper end of said post, a fluid-conducting tube connected with the generator and extending within the reservoir in the base of the post, a tube connected with said generator and also connected with the supplementary air-receiver, and means substantially as described for reducing the pressure of the fluid and compressed air in the gas-generator.

9. In agas-generatingstreet-lamp, a hollow post, a reservoir in its base for the reception of the liquid to be vaporized, means for supplying said reservoir with compressed air, a supplementary compressed-air receiver at the upper end of said post, and a conductor of compressed air leading from the reservoir in the base of said post to said supplementary receiver, and a valve cutting off the supply of compressed air to said receiver, a gas-generating valve-casing for the fluid and compressed air, having inner and outer concentric chambers and a spraying-chamber at one end of said valve-casing, said casing having its inner chamber provided with a perforate valve-seat, and orifices in said casing leading from the outer chamber to the spraying-chamber, a fluid-conducting tube having one end extending Within the reservoir for the fluid in the base of said post, and the other end extending wilhin the inner chamber of said valve-casing, and a valve in said tube, a compressed-air-condueting tube connected With the supplementary air-receiver and also with the outer chamber in the valve-casing, and a' valve in said tube, a valve-stem in the inner chamber of the valve-casing, and a valve on said stem in said valve-seat, a vaporizingtube connected with the end of said valvecasing having the spraying-chamber, and a balance-valve in the spraying-chamber having a passage for the vapor concentric therewith.

10. A gas-generating street-lamp comprising a hollow post, a reservoir for the liquid to be Vaporized in the base of said post, means forsupplying compressed air to said reservoir, a supplementary receiver for compressed air at the upper end of said post, and a conductor of the compressed air connected with the said reservoir and also with the supplementary receiver, a valve cutting off the supply of compressed air, a valve-casing having in` ner and outer concentric chambers, and a spraying-chamber at one end of the valvec'asing, said valve-casing having a perforate valve-seat in the inner chamber and spraying-orifices in the outer chamber leading to the spraying-chamber, a valve-stem in the inner chamber, anda valve on said stem Within said valve-seat, a vaporizing-tube connected at one end with the end of the valve-casing having said spraying-chamber, an air-mixing receiver at the other end of said tube, a pipe having one end extending Within the reservoir for the liquid, and the other end extending within the inner chamber of the valvecasing, a tube for compressed air connected with the supplementary air-receiver and also connected with the outer chamber of the valve-casing, a balance-valve in the sprayingchamber having a passage concentric therewith for the passage of the vapor, a tube vfor the generated gas connected with the air and gas mixing receiver at one end, and having the other end extending beneath the Vaporizing-tube, and means for regulating the supply of the liquid and also of the compressed air to the chambers in the valve-casing.

ll. A gas-generating street-lamp comprising a hollow post, a reservoir for the liquid to be vaporized in the base of said post, means for supplying said reservoir with compressed air, a supplementary receiver for compressed air at the `upper end of said post, a conductor of compressed air connected with said'reser- Voir and also connected with the supplementary receiver, a valve cutting oi'l' the supply of compressed air to said receiver, a valvecasing for the air and liquid having inner and outer concentric chambers, and a sprayingchamber at one end of the valve-casing, said valve-casing having a perfora'te valve-seat in the inner chamber and orifices in the outer chamber leading to the spraying-chamber, a valve-stem in the inner chamber and a valve on said stem within said valve-seat, means substantially as described in the sprayingchamber for reducing the pressure of the air and liquid, a vaporizing-tube connected at one end with the end of the valve-casing having said spraying-chamber, an air-mixing receiver connected with the other end of said tube, having separate adjustable parts, a tube for the generated gas connected at one end with one of the separate parts of said air-mixing receiver, and having the other end extending beneath the vaporizing-tube, and valves inthe fluid-conducting and compressed-air tubes.

EDMUND B. LUDWIG.

Witnesses:

CoRYDoN T. BUSH, JOI-1N T. MARSHALL.

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